Flat-bed printing-press.



W. S. HUSON. FLAT BED PRINTINQ PRESS, APPLICATION FILED MAY 1o, 1909.

Patented Feb. 22, 1910.

7 SHEETS-SHEET 1.

W. S. HUSOBL FLAT BPD PRINTING PRESS., APPLICATION FILED MAY 1o, 1909.

Patented Feb. 22, 1910 7 SHEETS-SHEET 2` w. s. HUsoN. FLAT BEDPRINTING PRESS. APPLICATION FILEDI MAY 10, 1909.

Patented Feb. 22, A1910.

7 SHEETS-SHEET 3.

W. S. HUSON. FLAT BED PRINTING PRESS.

APPLICATION IIL'BD MAY 10, 1909.

\`Patel11 3ed Feb. 22, 1910.

Patented Feb. 22, 1910.

7 SHEETS-SHEET 5.

1-- J www N1 \%N. www n 1w Y N klim@ .S www www www @M W. s'. HUsoN.' FLAT BED PRINTINGPRBSS.

APPLICATION FILED MAY 10, 1909.

950,136. vPatented Febgzz, 1910.

7 sums-SHEET si I IIHIHIIIII wps. HusoN. FLAT BED PRINTING PRESS.

APPLICATION FILED MAY 10, 1909.

r Patenti-3d Febb.V 22, 1910.

7 SHEETS-SHEET 7.

niviTnn sTATEs .rATaNT cranica.

WINFIELD S. HUSON, OF DERBY, CONNECTCT, ASSIGNR TO THE WHITLOCK PRINTING PRESS MFG. CO.,

OF DERBY, CONNECTICUT.

FLATLBED PRINTING-PRESS.

full, clear, and exact description of the same, and which -said drawings constitute part of this specification, and represent, in

Figure 1 a broken view in vertical longitudinal section of a iiat-bed printing press constructed in accordance with my invention and showing the outside gears employed for driving the impression cylinder. Fig. a View of the press in vertical longitudinal section on the line co-b of Fig.` 3, the impressioni"'cylinder being shown-by broken lines. Fig. 3 a broken plan view of the press partly in horizontal section. Fig. 4t a detached face view of the bed-driving gear, with the wrist-pin and wrist-pin plate rcmoved. Fig. 5 a similar View with the' cover removed and the cani-carrier partly in secconverter, so called, by means of which the cams vot' the"=beddriving gear are thrown, the' bed-driving gear shaft being shown in section. Fig.-7 a detached face view ot the wrist-pin plate and wrist-pin. Fig. 8 a view in transversei'section on the line c--fZ ot' Fig.

5 ot the beddriving gear. Fig. S) a broken sectional view showing the converter in its relation to the bed-driving gear. Fig. 10 a detached vieuxof the recessed block-carrying ring located within the converter. Y a plan view of one of the bed-racks, the

other being precisely like it. n Fig. 12 a view showing the development of the bed-driving gear. Fig. 13 ailetached view of the oscillating cam-carrier. Fig. 14 a similar view oi the double-ended Vsector. Fig. 15 a detail view showingthe ineclianisn'i employed for maintaining the reversing-block i'n position. Fig. 16 a broken plan View thereof, partly in section. Fig. 17 a broken view in elevationof a modified form of reversingbldck positioning. mechanism.- Fig.

'13a detail view iii"felevation of still another torni of reversing-block posltlonmg mech- Specication of Letters Patent.

Fi g. 1 1v Patented Feb. 22, 1910.

Application led May 10, 1909. Serial No. 495,151.

anism. Fig. 19 a broken end view4 of the device of Fig. 18.

My invention relates to an improvement in thatclass of fiat-bed cylinder `presses in which the cylinder is rotated by .gearing outside of the main frame of the press and in which the type-bed is reciprocated by a. bed-driving gear alternately engaged with racks connected with the bed which is driven in one direction by the coaction of the gear with one rack, and in the opposite direction by the coaction of the gear with the. other rack, v

The object of my present invention is to produce.A a simple, compact, durable and powerful bed-driving mechanism construct- .ed with particular' .reference to thc reciprocation of the type-bed at a high speed and to a .superior registration ot the bed with the impression cylinder.

With these ends in view my invention consists in certain details of construction and combinations ot parts as will be hereinafter described and pointed out in the claims.

In, carrying out my invention as herein shown, the press is provided with the usual impression cylinder 2 mounted upon `a shaft r3 carrying a gear 4 meshed into by a dr-ivstruction. v The cam-shaft 13 carries a box-cam 14 receiving a cam-roller 15 mounted upon one which also comprises a shell 17 and which is mounted so as to swing upon a sind or :Fulcrum 18 Xed'in a part of the frame 19 ofthe press. The cam 14- I shall hereafter call the. com'erter-cam. for convenience of identification. a blockfcarrying ring 20 provided at oppol:site points in* its circumference with radial guide-ways 21, 21, .receiving movable connecting blocks 22, 23, respectively mounted l The parts thus tar described are ot old and well known con- VVithin the shell 17 I locate end of the arm 16 of a converter, so called, f

through a segmental clearanceA slot 26 in the cover 26, and is carried by an annular i ment of the teeth of which cam-carrier-28 located, within the beddriv ing gear 27 so as to have oscillatingI movement upon the internal hub 29 thereof. The

sald cam-carrier 28 is provided at opposite points in its periphery with recesses 30 `for the-reception of block-like cams 31 and 3 res ectively co-acting with cam-rollers 33 and) 34, the cam-roller 33 being mounted near one end of a double-ended sector 35, while the cam-roller 34 is located in a corresponding position near'the other end of the sector 35, the respective ends of which are formed with wide toothed segments 36 and 37 and the radial movement or throw of which is sufficient to bring,the teeth of its segment 36 into play, while the teeth of its segment 37 at its opposite end are cut out of action, and vice versa; The sector itself is let into the'gear 27 so as to be radially mounted therein, being a -trifle shorter than the diameter of the gear.

hBy reference to Fig. 12 it will be seen that t e two fixed segments 38, 39, located out ofline with each other or staggered, and having interposed between them the segmental sections 36 and 37 of the double-ended sector which really forms a part of the bed-drivin gear 27.' The teeth of the segments 3 6 an 37 extend across the entire width of the gear so as to Join the segments 38 and 39 the the gear.V In Fig. 12 the segment 39 appears as divided at the ends of the ligure, but in reality the segment 39 is like the segment 38 and only appears to be divided in' the figure which is a linear development of the gear. Under this construction, the teeth of the gear` are separated byclearance spaces 40 and 41, as well as' by the clearance spaces temporarily reduced by the endwise movedouble-ended sector 35.

Fig. 11 of the drawings represents the lower bed-drivingrack 42. The upper beddriving racks are rigidly secured to the hanger 45 of the flat type-bed 44. As the bed-driving racks 42 and 43 are precisely alike, a description of the lower rack both. Following the principle on which the ,teetlr of the bed-[driving gear 27 are arranged, the teeth of the bed-driving racks are arranged in vthree sections 46, 46a and 47, the section 47 being out of line with the sections 46 and 46, and the three sections as thus arranged forming clearance spaces 48v 49 and 50. In the claims, or in some of The stud 25 projectsv teeth of the bed-driving gear consist of are only half the width of.

rack 43 1s identically like it. Both' will suiice' for block 53 [has been them, I shall use the generic term gearmg to designate these bed-driving racks or their equivalents.

It will be seen the,beddriving racks 42 and 43 from lthe 4lforegoing that gear 27 and the bed-driving are constructed on the principle, as'might besaid, of solids and voids, y.

so that while the teeth of the gear 'are coacting with the teeth'of one rack, the voids or clearance spaces of the gear are clearing-the teeth or .solids of the other rack and vice versa, the spaces between the segments 38 and 39 of 'the gear being bridged bythe wide segments 36 and 37 on theopposite ends of the sliding double-ended the operation of which is timed by the converter cam 14 so that the void produced by its endwise movement by the virtual retiresector 35 ment or withdrawal from play of one or the other of its wide segments 36 or 37, takes place vjust at the timethe clearance is re7 quired to avoid the teeth of the rack out fof play, whichever one it may be. In this connection I may say that the-bed-driving gear 27 mak bed-driving rack for each complete movement of the type-bed 44 in so far'as the typebedvis reciprocated by the bedLdriving gearv 27. The reversing of the type-bed in'direction of movement at the ends of its forward and es one complete revolution in each return movements, is effected independently i of the bed-driving racks. For this purpose I employ a wrist-pin plate 52bolted tothe bed-driving gear 27 and carrying a wristpin 52EL in turn carrying a reversing-block 53 which moves up and down between two pairs of vertical abutments respectively located at the ends 'of the type-bed 44 and each pair comprising a fixed abutmentv 54 and pivotal abutments 55 and 55a..k abutments 54 bed-hanger 45. shutters 55, upon other. parts of the bed-hanger 45. f The pivotal abtments, or shutters as they are commonly called, are provided with` camrollers 57, 58 for their operation, the cam- The pivot/al abutments4 or roller 57 of the shutter 55 entermg a cam-` path 59, and the cam-roller 58 of the shutter 55a. entering-ga cam-path 60. These cam-paths 59 and 60 are'located in the main frame 19 of the machine .at a` point substantially below the shaft 5a carryingthe bed-drivin@ ger 27. shutters 55, 55a, `is timed by the cam-l paths .59, 60, so that when in the movement of the type-bed one face of thel reversingbrought into engagement wit-h one of the ixed abutments 54, then theshutter forming the fellow vof the said abutment will immediately lbe swung into place and held in engagement with the opposite face of the said block 53during` the 55a, are pivotally mounted The 'fixed i form in'reality parts of the I The operation of 'the 'period covered by the reversal of the type bed vin direction of movement, this being 'effected by the vertical movement ofthe block for which the bed-driving gear 27 makes a half-revolution during which time the movement of the type bedthrough the medium of the reversing-block 53 and the said gear 27 is retarded, stopped, 'reversed in 1, 2. 3 '15' and 16 1n Y im roved )ositioninffc n n l C device consists of a vertically arranged. gulde- Y .plate G1 having a hor1zontal supporting-a rm 62 arranged to reciprocatecin a-bracket 63 applled` tofthe main frame 19 of the machine. The said plate G1- 1sformed with a guiding.flangeGLt entering a vertical'slot 65. formed for itsreception in the block It 'will beelear that as the bed-driving gear 27 moves the reversing-block' 53 up and down, it willbeprevented from rocking by the flange 64C- which is allowed to follow the block by the sliding movement of the arm 62- back andorth in theV bracket 63. In .this way insure 'thel right presentation of the block to theabutmentsz and. lthe shutters 55, 55, when the block is introduced between them to reverse the. type-bed in direction ot movement.

In the modified -form of positioning'de vice shown in Fig. 17, it takes the form of a Scotch yoke, -so called, 66 inclosinga guide-way' (37 forthereception of the revers` ingblock53 and vhaving horizontal supporting arms G8, v(if), reciprocating inbrackets. similar to (33 but not shown.

In the modified positioning devicc'shown in Figs: 1S and '19, a squaring shaftl 70 passes through Athe reversing block` i3 and ).nevents the's'ame from rocking 'upon its wrist-pin 52a. The said squarin'g shaft 70 is furnished at its ends in the usual manner with corresponding pinions 71,l 71 meshing into upright. racks 72 secured to the mainframe ltl-ot' the press. As the bed-driving gear 27 revolves with the shaft 5, tl1e-revel-sing block 53 'slides 'from one end to the other of the souaring shaft which risesand falls according to the throw of the gear,

but in all ot this' movement.' the blocka'i' itself is preserved in posit-ion. fo'r riglit presentation tothe ahntments 54, .54,-atftheend 6oit seems unnecessary to describe. the operation ofthe press at length. Iwill therefore .content myself with brief'lysettingforth the o eration of the bed-drivinrr eax-27 in conL junction with the bed-driving racks 42 andl 43. In the first place, it will be .understoodl that the path of the converter-cani 14- 1sl shaped so as to effect the oscillation ofthe annular cam-carrier 28 upon the hub 29 ot'- the bedrdrivi'ng gearv27, at the moment re- -quiredfor moving t-he double-ended sector 35 in one direction or -the other, the tamblock 31 being moved for coaction with its i roller 33 just as the cam-block 32 is moved v out of coaction with the-roller 34'andvice versa, so that the double-ended sector`35 is always firmly held. Nowlet it be supposed that the type-bedfll'has been-,driven tothelimit of its outward movement and reversed in direetionby the bed-driving gear 27 andA the reversing-block 53, and tha'tthe latter is just going out of play. J ust 'at this mol interval designated A 'in Fig.' 11.

the interval A, the' converter-cam 14 'operates' to bring the widesegment '13G of=the doubleended sector 35 into mesh with the section 46 and a portion of the section 47 `of the be'drackl 42, whereby the type bedis moved through the interval'designated.13. i At the' 'end of the interval B, the segment 38 of the gear takes up the section 47l of'the rack, so to speak, and carries the type-bed through the interval designated by C. During the 'in-- terval C, the4 converter-cam vlei is moving'the double-ended sector 35 in the opposite direction so that at the end of the interval C the 'wide segment 37' atl the' opposite end of Athe sector meshes into the unfinished end of the section 47 of the bed-rack and begins on' thel adjacent end. of the section 46 thereof during the interval I). At the conclusion of the interval D, the wide segment 37 runs out of the sect-ion 46 which is then meshed into by the' adjacent. end of the segment 39 of the gear which then carries the rack through the interval E, which completes the-movement ofA the bed .so far as the 'rack 'is concerned. The type-'bed having now been returned as far as.-the upper bedrack will Acarry it, is

moved still farther in'\ 1ardand reversed indirection by ythe reversing block. 53 as depicks up, so to-spealn the lower bed-rack l43 \v1tl1-'\\'hic h 1t coacts 1n precisely the manner described for the upper bedrack l2 in driv- 'mg the type bed to that point 1n its outward 'movement where the reversing-block 53 takes up' the work and completes the throw 'of the bed and thercversal of itsimovement. It has already been explained, how the arrangescribed, after "which the bed-driving gear 27 y t moved ltherewith, and without movingthe done, oi' the vertical or lateral movement of ing a high degree of perfection of registrabination with the vtype-bed thereof, ofan .fa bed-drivingggear having sections. ofteeth 50 bination lwith. the type-bed thereof, of "an v(i0 nient of the teeth of the bed-drivinggear 27 and the racks 42 and 43 provide for the Aclearance of the teeth of one rack, while the other rackl is in lay, and vice ver'saand that need not again be rehearsed. j Itl will be noted that bymy improvement, I secure the reciprocation of the type-bed without moving the racks-'except as they are bed-driving gear except as the same is rotated, whereby I avoid the vertical or lateral movement of the racks as has sometimes been the gear as has sometimes been done.. -Under my construction, also, -I am enabled to mount `the reversing-block 53 or actuator directly upon the gear.' I therefore secure a simple, '.compact, rigid and very -powerful beddriving mechanism capable of being operated'at a high speed andalways securtion between the type-bed andthe impression cylinder.

1'. In a fiat-bed printing press, the combination with the type-bed thereof, of an upper and a lower bed-driving rack carried thereby, each rack having its teeth arranged in sections with intervening clearance spaces, and a bed-driving gearhaving segments of teeth arranged with reference to the teeth andl clearance spaces of the said bed-driving racks, whereby the. said type-bed is reciprocated first infone direction and then in the other by the-alternate coaction of the gear' with the respective racks.

2. In a flatebed printing'press, the com# upper anda 4lower bed-driving rack carried,` thereby, and a bed-driving. gear` xed'f against vertical and lateral movement, the racksand gear having their teeth staggeredl for c learance.4 f fv 3. -In .a flatbed printing press,'the combination with lthe type-bed thereof, of' an upper and a lower bed-driving vrack carried thereby,- eachrack having its teeth arranged in sections with intervening clearance spaces,

arranged withreference to the teeth and clearance 'spaces of -the said bed-driving racks, the -said gear coa'cting with one rack to move the b ed inone direction, and with site direction, and 'a bed-reversing mechanism including an actuator mounted upon the at-bed printing press, the cornupper and a lower bed-driving rack rigidly connected with t the bed, a gear confined, against vertical and lateral movement and alternately coacting with and clearing th e .said racks, a bedre versing mechanism in cluding-.airactuator mounted Aupon the gear,

in operative position.

5. In a iiatbed printing press,` '.t he com-"- bination with the type'bed thereof, o f an upper and a lower beddrivmg rack rigidly connected with the bed, fia gearconned against vertical and lateral movement and alternately coacting withegid clearing the said racks, 'a bed-reversing mechanism 'including an actuator mounted upon the gear, and means connected .with the framing of the machine for maintainin inoperative position. -6. In a flat-bed rinting press, the combination with the ty e-bedthereof, of an g the actuator upper and a lowered-drivingrack car# ried thereby, a bed-driving gear meshing into the said racks, the said racks and gear having their teethvstaggered so that the teethofthe gearl c'lear one rackwhile meshing" into the other, andjvice versa, a doubleended sectorl mounted in' the gear and havin toothed segments at its ends of such a widt as to cover-l the staggeredteeth,- and means for reciprocating t e said sector to .bring its ends into play alternately."

-7. In a-iat-b'edp" rinting press, the combination vwith the type-bed thereof, of an upper and a lower rack carried 'thereby and having their. teeth arranged in staggeredy sections, a beddriving gear having its teeth arranged in 4staggered segments, a double- Iended sector having teethI at its ends, mountted in the said gear, cams located within-.the

'gear for 'moving the saidsector in o piosite 'directions to bring the teeth at one en' into p layI and toretire the teeth atv'its opposite en d, and means for the said cams. i 8. In a fiat-bed printing press, the combination with the ty 'e-bed thereof, of gearing periodically operating thereu on, a bedrivin giear for4 coacting -4 with t e gea-ring ,of the' -afdouble-'ended sector having teeth :at its ends, lcarried byg the gear, and means for periodically operating the said sector to supplement the teeth ofthe gear wheel in coacti ing of the type bed.'

9.' In a .fiat-bed printing press, the combination with the type-bedthereof, of an upper and a" lower rack carried thereby, a beddrivingwgear, a :double-ended sector mounted -in the gear in' which it has endwise movement, 'a cam-carrier concentric with the gear;

Vcams in "the said carrier for coaction with the sector tomove the same in oppositedirections, .and means connectedlwith the cam? c arrierlincluding a converter cam' -for oscillating the cam-carrier.l In'a flat-bed printing press, the l'combination withthe type-bed thereof, of bedng with the geares and means for maintaining thesaidactuator the said abutments.

' nation .with the driving racks carried thereby, a bed-driving gear coacting with the said'racks, a Wristpin mounted directly on the said gear, a reversing-block mounted upon the said Wristpin, abutmentslocated at the ends of the bed for coaction with the said block for reversing the direction of the 'bed, and means or anized Wholly independent of the said be -drivin gear and connected with the frame of t e press for maintaining the said block in operative position with respect to 11. In aflat-bed printing press, the combination With the frame and' the type-bed thereof, of\an upper and a lower rack rigidly connected with the bed,I a bed-driving gear coacting with the said racks andl confined against vertical and lateral movement, a reversing block carried by the gear, abut? ments located at the ends of the bed `for coaction with the block in reversing the direction of the bed, and means connected with` the frame for maintaining the block in operative position.

12. In a flat-bed rinting press, the combirame and the type-bed a bed-drivlng said gear and slidably7 connected with the frame of the press for maintaining the said block in operative position.

13. In a flat-bed printing press, the combination with the frame and the ktype-bed thereof, of gearing carried by the type bed,

gear coacting. With the gearing a reversing block carried by the gear andhaving a vertical groove, and means formed With a vertical flange entering. a

roove in the block for maintalning the-same 1n operative connected Wit zontally With respect thereto.

In testimony whereof, I have signed this specification in the presence of t-Wo subscribing Witnesses.

WINFIELD S. HUSON.

Witnesses:

FREDERIGC. EARL, CLARA L. WEE.l

osition, the said means being the frameV so as to slide hori- 

